National Weather Service Forecast for: Vallejo CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:51 pm PST Dec 17, 2025
 
Tonight

Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Mostly Cloudy
then Patchy
Fog
 Thursday

Thursday: Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Calm wind becoming west southwest around 5 mph in the afternoon.
Patchy Fog
then Partly
Sunny
 Thursday
Night
Thursday Night: A 40 percent chance of showers. Cloudy, with a low around 51. Southwest wind 3 to 5 mph.
Chance
Showers
 Friday

Friday: Showers, mainly after 10am. High near 57. South wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers

 Friday
Night
Friday Night: Showers, mainly before 4am. Low around 53. Southwest wind 6 to 9 mph. Chance of precipitation is 90%.
Showers then
Showers
Likely
 Saturday

Saturday: Showers likely, mainly after 10am. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Showers
Likely
 Saturday
Night
Saturday Night: Showers, with thunderstorms also possible after 10pm. Low around 54. Chance of precipitation is 80%.
Showers

 Sunday

Sunday: Showers. Cloudy, with a high near 57.
Showers

 Sunday
Night
Sunday Night: Showers. Cloudy, with a low around 52.
Showers
Lo 42 °F Hi 57 °F Lo 51 °F Hi 57 °F Lo 53 °F Hi 56 °F Lo 54 °F Hi 57 °F Lo 52 °F

 

Tonight
 
 Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Thursday
 
 Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
 
 A 40 percent chance of showers. Cloudy, with a low around 51. Southwest wind 3 to 5 mph.
Friday
 
 Showers, mainly after 10am. High near 57. South wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
 
 Showers, mainly before 4am. Low around 53. Southwest wind 6 to 9 mph. Chance of precipitation is 90%.
Saturday
 
 Showers likely, mainly after 10am. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Saturday Night
 
 Showers, with thunderstorms also possible after 10pm. Low around 54. Chance of precipitation is 80%.
Sunday
 
 Showers. Cloudy, with a high near 57.
Sunday Night
 
 Showers. Cloudy, with a low around 52.
Monday
 
 Showers likely. Mostly cloudy, with a high near 55.
Monday Night
 
 Showers likely. Cloudy, with a low around 47.
Tuesday
 
 Showers likely. Mostly cloudy, with a high near 52.
Tuesday Night
 
 Showers. Cloudy, with a low around 47.
Wednesday
 
 Showers likely. Mostly cloudy, with a high near 51.

 

Forecast from NOAA-NWS for Vallejo CA.